title: Induction or elimination of tumor-specific immunity against a chemically-induced rat tumor using auto-anti-idiotypic immunity.
abstract: DA rat sarcoma P1 and P2 were induced by dimethylbenz(a)anthracene. A tumor-specific immune response of DA rats against P1-tumor cells could be demonstrated at the humoral and cellular level. DA anti-P1 antibodies were purified on fixed P1-tumor cells and used as auto-immunogen in DA rats for the production of anti-idiotypic antibodies. Such anti-idiotypic antibodies could be demonstrated by using a solid-phase radioimmunoassay and by their ability to induce secondary type of DA anti-P1 response in vitro. In addition, such antibodies were able to induce cytotoxic T lymphocytes capable of eliminating P1-tumor cells but not control tumor cells. In some of the auto-immunized DA rats enhanced P1-tumor growth could be observed, indicating that the anti-idiotypic immune response had led to a selective ablation of idiotypic, potential anti-P1 reactive T cells.
mesh_terms: D015127:9,10-Dimethyl-1,2-benzanthracene; D000818:Animals; D000888:Antibodies, Anti-Idiotypic / Q000276:immunology*; D000917:Antibody Formation; D001323:Autoantibodies / Q000276:immunology*; D002460:Cell Line; D003602:Cytotoxicity, Immunologic; D005260:Female; D007111:Immunity, Cellular; D008297:Male; D009368:Neoplasm Transplantation; D051381:Rats; D011919:Rats, Inbred Strains; D012513:Sarcoma, Experimental / Q000139:chemically induced / Q000276:immunology*; D013601:T-Lymphocytes / Q000276:immunology*; D014185:Transplantation, Isogeneic
chemical_list: D000888:Antibodies, Anti-Idiotypic; D001323:Autoantibodies; D015127:9,10-Dimethyl-1,2-benzanthracene